{"product_id":"l8148e1281-honeywell-spst-immersion-aquastat-140-240f","title":"L8148E1281 | Honeywell SPST Immersion Aquastat 140–240°F","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"452\" data-start=\"95\"\u003eThe Honeywell L8148E1281 is a single-pole, single-throw (SPST) immersion-type Aquastat designed to control water temperature in hydronic heating systems. It provides precise temperature regulation within a 140°F to 240°F range, ensuring efficient boiler operation and consistent heat delivery.\u003c\/p\u003e\n\u003ch3 data-start=\"502\" data-end=\"534\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 99.964%; height: 509.6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eTemperature Controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eL8148E1281\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eAquastat Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eSPST Immersion Aquastat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 39.2px;\"\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 39.2px;\"\u003e140°F to 240°F (60°C to 115°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eSwitch Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eSPST (Single Pole Single Throw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eHydronic Heating Systems, Boilers, Water Heaters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eControl Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eHigh Limit and Circulator Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eMounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eImmersion Well Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eSensor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eImmersion Temperature Bulb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003e120 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eFrequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eElectrical Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eSuitable for line-voltage burner circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eWorks with 24V Thermostat Circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 39.2px;\"\u003e\u003cstrong\u003eProtection Feature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 39.2px;\"\u003eHigh Limit Control with Safety Cutoff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003eStandard Honeywell Aquastat Size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 21.1047%; height: 19.6px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78.7621%; height: 19.6px;\"\u003e4.00 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003eL8148E1281\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe L8148E1281 belongs to Honeywell’s L8148 Series of immersion-type Aquastat relays designed for precise temperature control in hydronic heating applications. It acts as both a temperature limit and circulator control, managing the boiler operation based on water temperature. The SPST switching configuration allows it to control the burner circuit directly while interfacing with low-voltage thermostats. With an operating range of 140°F to 240°F, it ensures optimal system performance and protection from overheating. The immersion-type sensor provides fast response and accurate temperature sensing, while its rugged construction guarantees long-term reliability. Commonly used in boilers and water heaters, this control maintains consistent comfort levels and efficient heat exchange in residential and light commercial systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWide Temperature Range: Adjustable control from 140°F to 240°F for flexible heating system operation.\u003c\/li\u003e\n\u003cli\u003eSPST Switching Design: Provides reliable burner circuit control for hydronic and boiler applications.\u003c\/li\u003e\n\u003cli\u003eImmersion-Type Sensor: Offers precise temperature sensing directly within the water system for accurate response.\u003c\/li\u003e\n\u003cli\u003eHigh-Limit Protection: Automatically shuts off burner operation when temperature exceeds set limits, enhancing safety.\u003c\/li\u003e\n\u003cli\u003eCompatible with 24V Thermostats: Integrates easily with standard low-voltage thermostat circuits for simple installation.\u003c\/li\u003e\n\u003cli\u003eDurable Steel Housing: Protects internal components from moisture and corrosion for long-lasting performance.\u003c\/li\u003e\n\u003cli\u003eEasy Installation: Fits standard immersion wells, making replacement or retrofit straightforward.\u003c\/li\u003e\n\u003cli\u003eStable Operation: Maintains consistent boiler cycling and circulator performance for energy-efficient heating.\u003c\/li\u003e\n\u003cli\u003eVersatile Application Range: Suitable for use in residential and commercial hydronic systems, water heaters, and heat exchangers.\u003c\/li\u003e\n\u003cli\u003eProven Reliability: Built to Honeywell’s high standards for precision temperature control and mechanical durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe L8148E1281 delivers the reliability and precision required for efficient temperature regulation and system safety in hydronic heating installations.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105124917504,"sku":"L8148E1281","price":1315.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/116A17_AW01.jpg?v=1785540812","url":"https:\/\/alotechparts.com\/products\/l8148e1281-honeywell-spst-immersion-aquastat-140-240f","provider":"Alo Tech Solutions","version":"1.0","type":"link"}